Electronic Basics #2: Dimming all kinds of LEDs!?

[@coralaisly]

Came for the electronics knowledge... stayed for the single LED rave.

[@thesnowedone]

"Now you can host your own rave *Nnzztz* *Nnzztz* *Nnzztz*...." Okay who else giggled to that one? :)

[@littlegoobie]

+Yuki Fox or "this is bullshit" hahaha.

[@coralaisly]

Single LED rave ftw!

[@johnsailor3590]

If this is basic I'm screwed up

[@johnsailor3590]

***** sharee

[@alexandrosanastasiou1964]

It is basics if you have done 2 years of electronics engineering

[@3Dcut]

it is one of thefirst chapters in the most arduino books, just less explained

[@_CaliBer_x]

@@alexandrosanastasiou1964 i have 0 engineering experience and dont even have an arduino or a bread board and i still understood it. watching videos like this is what taught me. honestly this stuff isnt that hard.

[@ExperimentalDude]

@@_CaliBer_x "i understood it, therefore, everyone should"

[@tom928]

Your channel is the most brilliant and creative channel that I have ever saw! 🙂

[@greatscottlab]

Thanks mate

[@Alley00Cat]

Any chance you can explain the circuit for LM317 for the strip? I'm trying to do the same. Thanks :)

[@M4xHDxD]

Thanks for the tutorial, if I understand correctly the only component I have to change for different voltage LEDs in the NE555 configuration is the resistor in series with the LED, right? The rest of the components are all the same? Also what kind of Capacitors are these exactly?

[@TheOneSpam]

Ep1: this is a multimeter and ohms law Ep2: here's a breadboard, microcontroller, leds, PWM, potentiometer, resistors .... Me: O_O

[@p.k.953]

😅😂😂i feel you bruh...!!!

[@maxwell_edison]

Looks like I need even more basic

[@novavanguard1313]

even me

[@barrybrown4729]

I love how you say "Bullshit"

[@joesoh]

or Let's get started! lol. But it is an awesome channel!

[@M4xHDxD]

"Now you can host your own rave." - GreatScott 2014

[@hugopalma14]

Maxi6411 bitz bitz bitz

[@BoomBoom-ym5oy]

This channel is a gem.

[@uomodibassamorale]

this is an instant subscribe for me. I'm just getting into this great discipline i somehow avoided in the last 30 years. So thank you, great stuff!!

[@kugodx9]

same currently, hope you made progress!

[@bradleygann]

Great video series! New to Arduino and watching your vids to get more basics. I'm digging the one led rave.

[@8bit_coder]

I remember that time that I was binge watching your videos one by one for a whole day . . . good times

[@jlucasound]

You have become one of my favourites. Like top 3.

[@DavidJapanese]

Ab jetzt kann ich ein "Wave" veranstalten :) Deine Videos sind echt gut!

[@ClintonC1991]

Rip to g+. made me sad when you said it ,but then happy again to have had such a good time. ✌️

[@sanyarin]

Thumbs up for the great beat at 2:34 :-)

[@realdragon]

3:46 electronic basics

[@Ryesagain]

why does your "electronics basics" play backwards? is it just me?

[@hawkercnc8261]

Would you be able to use a 12 or 24 volt battery with the pwm method. Small pwm units are available ready made on ebay. One of these units, a 12 volt lead acid battery and a ten or twenty watt cob led and no other kit? The pwm units are for small motors but one guy uses them for leds. He did not say what his power source was.

[@darshitdarji3217]

2:16 seems like 100% duty cycle. That is like 5V DC right? then how that LED survived at that moment?

[@analog56x]

Im having some weird issues with this 555 circtuit... the electronics store that i bought my components from didnt have the BUZ11 mosfet, but they found one that was comparable: IRF540N, so ive installed it. Im using this circuit to dim 10 lasers that are hooked up in parallel. The input voltage of the circuit is 5.0v from a computer power supply. So here is where it gets weird... with a single laser installed, the dimmer works flawlessly. I add a second, and the output voltage jumps up to around 8 volts, and the when i adjust the potentiometer, the lasers dim at different rates. One dims out before the other starts to dim. I now have 6 out of the 10 lasers hooked up, and the output voltage is now at 19.56 volts. One of the lasers is running very dim, while the other five lasers are full power. The five lasers are dimming near the same rate, but the one that is already dim turns off completely. I have no idea why the output voltage keeps increasing with every laser i add... Is it just a simple case of using the wrong mosfet? Or is this circuit simply not going to work for what i need? Thank you to anyone who offers any helpful advice!

[@srivishnusaravanakumar6605]

great vid! ive been using pwm without fully knowing its potential. and now i know wtf it is! thanks

[@dreamyrhodes]

Hey Scott can you make a PWM video where you explain, how PWM can be used to convert digital signals to analog without an DA converter? Always wanted to undestand that. It's somehow that you change the pulse with in a way that it creates a near sinus analog wave.

[@alphonseprecis2302]

All ok until approx 3:00, starting to understand, then you take off on some kind of turbo afterburner in advanced electronics, leaving me far far behind. This is episode #1. What's the point, I mean who's the intended audience for this?

[@ajsiemers]

Alphonse Précis same here, I was like "wait, wait WAIT!! and backup to where you said 555"

[@therithwikrayani]

He is German.

[@carlnikolov]

Hahaha my thoughts exactly.... We went from hosting our own rave to that spaghetti wiring on a breadboard

[@jundalagan2247]

Hey sir scott... what frequency you often use on your circuit? Like that dimming circuit and the boost and buck converters

[@MonkellD]

Im trying to wire a brake light/marker light on to my car. Im going to cut into the tail light wires and bring two positive wires to the new light. One being tail marker, and the other one brake light. So the light i bought only has a brake light on a single wire. I was wondering if i could wire in a resistor to the tail light wire to make it come on with tail lights dim and full power on brake light. Can you help me identify what parts i need to complete this project? And so i dont backfeed power because the two wires will have to connect to the single wire. And tail light will always be on unlike the brake light. Thank you for your time!

[@mandyodd]

Please let me know following, can we control 2v LED with 12V PWM, if yes what should be the width of the 12V pulse and width of the 0V pulse (with out using resistance in series with LED), if we keep the 12V width really small then the led will never burn out because high voltage and current ( product is temperature ), and then the 0v width will allow the the LED to cool down before the next 12v pulse.

[@thehentailord6708]

Exactly what I've been looking for

[@ernic4]

I fall in love with this channel

[@champagne_tankie]

If i use pwm will it be visible when I record it. Like recording with a 60hz camera somewhere where there is 50hz current (flickering)?

[@bytaleuxss6634]

Michael Wiedemann yeah

[@brucewawe]

Nice video, I appreciate the detailled explanation. I'd like to know something, can you dimm non dimmable dels with pwm technique ? From internet some says that you can, but i'm not sure

[@med_juggler]

i thought this was for people learning basics... however it is hard to understand for a beginner lke m abt pulse width modular, the making of the plastic pcb... however a great video... Hope i can understand it in the near future,,,

[@b.w.oostdam8875]

Dear Great Scott. I like your explanation but... I have a desing question that up to now I have not been able to solve. I want to dim a low power LED (in this case a bicycle rear-light LED). The dimmed state would be the normal operation state. When I apply the brakes I want the LED to become brighter (i.e. brake-light). That should be by the use of a momentary switch. I do not like the solutions with resitsors and diodes. Ik was hoping you or someone like you would have designed such a solution around a 555 chip for insance. Maybe there are already better IC's for this I do not know. Could you device such a schematic ? I would be very interested. Thanks in advance for your efforts and educational youtube postings which I am enjoying very much.

[@AlexSKelly-up7lf]

You could just hook a push button on the place you rest your hand when you brake, so that when you pull, the button is pressed. I suppose you already know how to dim a normal led so just put it in 50% duty cycle and then, through digital read of the button state, set it to 100 when you brake. That should do it, assuming of course that you have not solved this yet, in which case I hope you will be able to make it work

[@sr-de5nz]

3:30 my brain start to explode..

[@pockeybearmilk264]

haha

[@pratikbhagat9894]

can we control cbt-90 luminus leds which have 9amp current and 3v vforward using pwm technique

[@CRRollyson]

haha dude you are awesome. Thanks for being so entertaining while explaining these things!

[@TheGalacticWest]

But what if I want to dim a large 14-36v led above an arduinos v limit. What if I want an led to dim on and off with a single toggle button? Button-arduino pwm-buck converter(wouldn’t work)-light? Just put a big capacitor in line(unsafe).

[@Mr_ToR]

what is the PWM frequency with the 555 circuit?

[@balanbogdan9160]

Also DC mottors,medium power consummers,and using H Bridge,you can controll direction of spining of motor

[@retronexusio]

nice work man! continue the great work

[@fitzjordy]

Came here again to listen to the best beat ever.

[@riccardofinotti1019]

Hi, I have big poster in my room and I've put come RGB leds all around it, I was thinking, since it takes 12 volts to power it all... I want to build a driver to incorporate in to the frame of gbe poster... the one that came with the leds it's really big. I just need to be able to switch between the comors and adjust the intensiti. I've already looked around I don't find notheing smaller than a Arduino mega. could you pleade help me?

[@rzagunes2410]

is there a resistor between second and sixth in 555 timer or is it something different

[@jackinatox9265]

You said lowering the Pwm would change the time between on and of, but later you said, it’s decreasing the voltage?! I don’t understand it? Is voltage and pwm the same?

[@xryokaii]

Hi Scott, So I have 2 led day time running lights in the car and I'd like to dim them because they are too bright. I have found some 50w resistor wires on ebay and I want to know if i use those will it make the lights dimmer so its not as bright? or will it require much more complicated wirings? the 2 lights is 30w and the resistor wires are 50w 6 ohm. Thanks

[@julekk4126]

Scott can you make a list with things you'll need cuz i dont realy know what to buy

[@gysbertusjfourie5523]

Hey Scott, can you maybe tell me how to connect mosfet in parallel and what resister value is need between the gates... I will be using 100wx3 led chips in series (forward voltage 30-36v), on the IRF540 mosfet. That said, I want to dim 4 sets of (100wx3 led chip) from the same dimmer?

[@analog56x]

Gysbertus J Fourie im working on something similar, except with 10x 5mW lasers. Having issues with this circuit after adding the second laser... im hoping that i dont need 10x of these dimmer circuits, because that would defeat the purpose of what i am trying to do...

[@bristichabukdhara5890]

very helpful!!! but what software u use in all d projects??plss tell me

[@MilanKarakas]

bristi chabukdhara This is Arduino board, which uses C or C++ code, or better known as 'sketch'. Please google, "arduino" , "sketch" "C language". You make your own software using Arduino IDE and your favorite Arduino board (namo, mini, pro, tiny...). I hope it helps. If you have additional questions, feel free to ask.

[@Photoshopuzr]

your the man but where do you buy all your parts and slots to push in those ics?

[@bakachelera]

I want to buy my own little white pad with holes in it for components to be stuck in there temporaly thingy, what is it called?

[@niels4111]

You mean a breadboard (solderless) ?

[@dasgettopikachu7878]

is pwm the reason for the line with three smaller lines under it on power supplies?

[@noklat4482]

If you can dim the led in the arduino by lowering the voltage (0 - 255) why use PWM anyway? Does it put a strain on the board? I'm trying to understand.

[@noklat4482]

+Joaquin Serka so it kind of works, but it's the lazy man's way. Also, it can blow up the potentiometer wich is bullshit, apperently. Thanks for the reply, it's very clear now.

[@goranserka3601]

+Thijmen de Jong Look also at the PWM vs Potentiometer video on the same channel

[@蕭良宇-m8d]

Is there any tutorial about how to make a power supply and Oscilloscope?

[@jecivilcwpd4639]

Which MOSFET you used

[@dominic8570]

what kind of mosfet are you using?

[@JocelynDaPrato]

you should do more beatbox greatscott on the block!

[@bearbin]

What are the point of the diodes connecting to the potentiometer in the 555 schematic?

[@MilanKarakas]

***** This is because one diode is connected to charge and another to reset pin, which in turns acting as a 'information dirrection control'. It defines threshold and rate of discharge, while maintaining constant frequency (frequency is not so important). At putput, you get on and off state proportionally long or short depending of potentiometer parameters. Hope this helps.

[@user-yw3ry4wd2x]

I think it prevents floating? Or something similar I nit sure

[@pradyumnamishra4810]

What is that white color board with so many holes called ? Sorry , I am a noob . I want to learn

[@anthonyselby8337]

Pradyumna Mishra a bread board

[@florandegraeve9496]

why my transformer starts to make noise and after 5 minutes my potentiometer would not work anymore. i have a 12.5A 12V stripled (10M) and i use IRLZ44N mosfet. does somebody knows something?

[@M4xHDxD]

Can you help me? Which kind of capacitors are these in the NE555 configuration? Thanks in advance...

[@AlexSKelly-up7lf]

Plastic film caps, cheap and easy to get, non polarized, they come in very small capacitance values

[@gaston1473]

In your code, at line 7, you wrote "potentiometervalue" instead of "potentiometer"

[@baysimo59]

Where do you buy your electrical components? Specificly the 555 timer chip (sorry if i made mistakes)

[@greatscottlab]

simeon todorov Mostly Ebay

[@VictorRivarola007]

+GreatScott! How do you convert an Arduino or 555 PWM output yo a real analog signal? Would a capacitor do the trick? I would do the experiment myself, but I don't yet have an oscilloscope.

[@Loundre3]

An LC low pass filter will work best.

[@VictorRivarola007]

Thanks for the reply. I don't understand how you could use an LC low pass filter. Could you please make a video on that?

[@Loundre3]

No (my channel is not an electronics one), but i can describe how it works and post links for resources.

[@AliKhan-tl6yu]

hey i m Ali khan . asa i have problem in basics of electroincs and your tetorials of basic electroins are not in so much details so its difficult to undersatand but i like what you teach and i want it to learn each lesson in details please reply if you can do something about it . I will be very thankful

[@istasyonninsani]

Which mosfet did you use ? I did not catch it. Ty.

[@analog56x]

Serkan Yıldırım BUZ11 mosfet

[@FabRecUp]

Can i use an optocoupler indtead of the mosfet ?

[@sandhyabhandary2517]

Thanks for schematic it worked very well

[@simon8206]

Can you use another 3.2V LED with the NE555 version?

[@kamleshvaghela3195]

How to troubleshoot to the cytron dual channel motor driver board.

[@veronikawinkler9098]

Very helpful video.

[@yesitsdawid]

Can I use a 10 k pot for the 555 timer circuit??

[@slicktires2011]

does the pwm modulates current too or only voltage?

[@JuddMan03]

it modulates the power on and off... so you could say it modulates both?

[@paherbst524]

whats the frequency of the output?

[@dfmayes]

2:52 Typo on line 7. Should be "potentiometer" not "potentiometervalue".

[@hosseinebrahimi3451]

I just learned some about PWM but i still don't know how to diy a pwm or how it works. But i guess dimming one led is basic but dimming multiple of them is advance.

[@kallezieritz]

I got some led in paralell, well 100 of them. and thay are going to use about 300w (about 480mah) i don't think the arduino is capable with that much power. any suguestions? (i am not english)

[@greatscottlab]

+kalle zieritz A Transistor or Relay.

[@kallezieritz]

+GreatScott! Thanks, danke fuer das tolle video! :D

[@FutureAIDev2015]

Th...three hundred watts?! HOW...

[@kallezieritz]

+Matthew Ferrie well, it's high power led 3w each, (3.6V~3.8V Forward Current: 700mA) times (*) 100=300w (if i'am not wrong)

[@HVinduction]

Leds might NEVER be putted in parallel!

[@geoffreygoldberg448]

Excellent tutorial!

[@kelvinpragassa4871]

I am looking for high power led.. how do I get

[@arrowstheorem1881]

I wonder why people say using pwm to dim ledlights lead to visible flickering when the frequency is easily above 600 hertz which i think should be enough to fool the eye

[@messcommand7819]

GreatScott!

[@cornelisbouwman940]

So you can't dimm a led strip without using the arduino? Simply because a strip requires to much amps?

[@greatscottlab]

+cornelis bouwman No. You only need the PWM Signal and a fast switch.

[@ddfanani]

+GreatScott! can you please post a schematic for it? I'm working on a project involving a led strip that fades in for about 15 minutes and I can't find out how to wire it

[@heritiermat]

+Tsach Levi how did your project go? i am working on something simliar

[@ddfanani]

I have decided that I'll use arduino instead. I'm currently learning how to program arduino to keep time so I can time this to fit the project

[@Konivenz]

Warum kein Untertitel mehr? War ganz nützlich beim ersten Video ;)

[@greatscottlab]

Ich arbeite daran. Werden früher oder später fertig sein.

[@adityathakar4393]

What is function of map(potentiometervalue,0,1023,0,255)

[@lolz2018]

What mosfet do you use to dim those ledstrips? :D :D

[@greatscottlab]

***** BUZ11

[@lolz2018]

thx for the reaction :D :D

[@MilanKarakas]

***** Also you may use any mosfet, depending of your application. Be sure before buying and appying such mosfets to read datasheet of the product. You need to know few factors, as is maximum voltage, maximum current, but also capacitance between gate and the rest (source, drain). If capacitance is too high, then it means more current drawing from your Arduino or 555 timer, proportionally with frequency applied. The higher the frequency - the more current it will draw from those output pins from the chip. Plese find datasheet of your Arduino or other chips you use and look how much current is allowed per each pin. Hope this helps.

[@dfmayes]

Normally you would set the voltage on the bench power supply to a safe value and then adjust the current.

[@ojasojas3989]

Can i use an arduino nano ?

[@mikegleasonjr]

how many amps my led strip can pull with this circuit? (EDIT: nevermind It depends on the rating of the Mosfet)

[@MitgliedT5]

I need some help here: PHANTEKS PWM-Lüfter-Hub is a pcb with fan headers for 3-pin casefans, which are controlled via the pwm signal of the motherboard header (4-pin to 4-pin) and for additional power (the motherboard header does not have enough amps) there is a 2-pin to molex/sata 12v..... But this thing costs 20 bucks ... and it can't be so hard to build something similar, but there is no scematic for that pcb neither i'm that into electronics, that i could tinker something like that hub out.... Could anybody help me ? @GreatScott! +GreatScott!

[@MitgliedT5]

a MOSFET will be the answer ? pwm signal from motherboard to gate, 12 volt molex to drain and ground to source and than slitt that to the other fanpins ?

[@MitgliedT5]

nope 12 volts from molex to all leds but negativ from the fan pins to drain and ground to source, right ? and pwm to gate, right ?

[@dotdissonance]

Excellent!

[@rmdhn1]

Why even use the PWM if you attached a mosfet? All that voltage and is still going trough a variable resistance and thus wasting power isn't it?

[@jorgediaz6730]

is there a way to generate pwm WITHOUT ICs?

[@jorgediaz6730]

and WITHOUT making your own 555?

[@id513128]

+Jorge Diaz Flip-flop transistor. ;)

[@cloroxbleach1200]

+Jorge Diaz Yes, with a relay, capacitor and potentiometer. It'll however make a sound at the switching rate of the relay.

[@verymuchgoodgaming132]

Press a button REALLY fast (Jk)

[@cloroxbleach1200]

Check out oscillators by this guy (greatscott)

[@B360-q9o]

very nice explanation thank you

[@daz41262010]

great video :)

[@ersk1983]

1:58 Nice old East German oscilloscope.

[@Foga001]

i waching his videos long ago, but i just today realized, he had the same scope like me

[@smorrow]

Reminds me of nitrocaster's Soviet stuff.

[@mandirathapa8950]

Pls make video on 555 ic

[@kamleshvaghela3195]

Please upload cytron dual channel motor driver board video

[@hquanngd]

Greatscott: Exploding POT = bullshit I still use POT for dimming LED: Look like he was too weak to handle that big.

[@IvanQuaglia]

little bit late...but thanks! great video!

[@filmproductions2427]

i have to admit i laughed so much at the rave joke its embarrassing

[@alexandrumoise1511]

mistake in the code: PinMode(potentiometervalue, INPUT);

[@ddee2501]

Museum quality oscilloscope